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Question

# The circuit pictured below shows a battery, a resistor, and an uncharged capacitor with labeled values of voltage, resistance, and capacitance. The circuit also includes a switch, which can be opened (as pictured) or closed.What is the value of the current in the circuit at the instant the switch is closed?

A
2.0A
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B
8.0A
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C
128A
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D
4.0A
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E
No current flows (0A)
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Solution

## The correct option is A 2.0AAs the capacitor is uncharged initially, thus potential drop across the capacitor is zero at the instant the switch is closed and hence the entire potential of the battery gets dropped across the resistor.∴ Current in the circuit at the instant the switch is closed I=16.08.0=2.0 A

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